DE29509461U1 - Dryer section - Google Patents

Description

VOITH SULZER PAPER MACHINES GmbH. Heidenheim Dry section

The invention relates to a drying section of a paper machine according to the preamble of claim 1.

Such arrangements are already known from US Pat. No. 5,325,608, although the required height of the drying section and, related to this, the accessibility of the upper drying cylinders cannot be satisfactory.

The same applies to a solution proposed in US Pat. No. 5,144,758, which aims to simplify the design of such drying sections and to minimize the distance between the drying cylinders and the deflection rollers.

The invention is therefore based on the object of creating a drying section which, in addition to the advantages of the prior art, has a lower construction height and, if possible, also improved accessibility.

According to the invention, the problem was solved by the fact that the axes of the drying cylinders of one of these adjacent drying groups are located approximately on one level below the paper machine floor. In order to achieve the greatest possible simplification, the deflection rollers of all drying groups located between the drying cylinders of the respective drying group should be arranged approximately on one level.

The accessibility of the axes of the lower drying cylinders can be ensured or improved by means of recesses in the paper machine floor. This is particularly important because of the drive and the steam supply of these drying cylinders. In this context, an intermediate floor is also required, at least in the area of the axes of the drying cylinders located under the paper machine floor between the

Paper machine floor and the basement floor are advantageous.

The invention will be explained in more detail below using an exemplary embodiment. The attached drawing shows:

Figure 1 shows a schematic cross-section through part of a drying section

and
Figure 2 is a schematic representation of the storage area of a lower

Drying cylinder 5b.

As can be seen in Figure 1, the drying section here consists of more than two drying groups 1a, 1b, 1c, in which the paper web 2 together with an endless drying screen 3a, 3b, 3c assigned to the respective drying group 1a, 1b, 1c is guided alternately over deflection rollers 4 in the form of suction rollers and heated drying cylinders 5a, 5b, 5c, whereby the paper web 2 is located between the respective drying screen 3a, 3b, 3c and the drying cylinder 5a, 5b, 5c and in the drying groups 1a, 1b, 1c only one side of the paper web 2, changing from drying group to drying group, comes into contact with the drying cylinders 5a, 5b, 5c. All deflection rollers 4 between the drying cylinders 5a, 5b, 5c of the corresponding drying group 1a, 1b, 1c are located in one plane 9 above the paper machine floor 6, which leads to a simplification of the construction.

In addition, the axes 7 of the drying cylinders 5b of the drying group 1b shown in the middle of Figure 1 are arranged in a plane 8 below the paper machine floor 6. This reduces the height of the drying cylinders 5a, 5c of the adjacent drying groups 1a, 1c, which are arranged essentially above the deflection rollers 4, relative to the paper machine floor 6, which on the one hand improves the accessibility of these drying cylinders 5a, 5c and on the other hand significantly reduces the height of the drying section.

In order to ensure good access for personnel to the drying cylinders 5b located at the bottom of the middle drying group 1b, the

The paper machine floor 6 has a recess 10 in the area of these drying cylinders 5 or their storage areas, with an intermediate floor 12 located between the paper machine floor 6 and the basement floor 11. This intermediate floor 12 can be reached, for example, via a staircase from the paper machine floor 6, so that the storage area with the drive, the steam supply, etc. of the corresponding drying cylinder 5b is easily accessible.

The transfer of the paper web 2 between the drying groups 1a, 1b, 1c takes place, as described in US-PS 5 144 758, among others, without open pulling of the paper web 2, whereby the drying screens 3a, 3b, 3c are guided via further deflection rollers

Claims (4)

• · • · Protection claims: 1. Drying section of a paper machine, consisting of several drying groups (1a, 1b, 1c), in which the paper web (2) together with at least one endless drying screen (3a, 3b, 3c) assigned to the respective drying group (1a, 1b, 1c) is alternately guided over deflection rollers (4) and heated drying cylinders (5a, 5b, 5c), wherein the paper web (2) is located between a drying screen (3a, 3b, 3c) and the drying cylinder (5a, 5b, 5c), in the drying groups (1a, 1b, 1c) only one side of the paper web (2) changing from drying group to drying group comes into contact with the drying cylinders (5a, 5b, 5c) and the deflection rollers present between the drying cylinders (5a, 5b, 5c) of the respective drying group (1a, 1b, 1c) (4) at least two adjacent drying groups (1a, 1b, 1c) are arranged approximately in a plane (9) above the paper machine floor (6), characterized in that that the axes (7) of the drying cylinders (5b) of one of these adjacent drying groups (1a, 1b, 1c) are located approximately in a plane (8) below the paper machine floor (6). 2. Drying section according to claim 1,
characterized, that the deflection rollers (4) of all drying groups (1a, 1b, 1c) present between the drying cylinders (5a, 5b, 5c) of the respective drying group (1a, 1b, 1c) are arranged approximately in one plane (9). 3. Drying section according to claim 1 or 2,
characterized, that the paper machine base (6) has recesses (20) ensuring accessibility to the axes (7) of the drying cylinders (5b) arranged underneath it. 4. Drying section according to one of claims 1 to 3, characterized in that in the region of the axes (7) of the drying cylinders (5b) present under the paper machine floor (6) there is an intermediate floor (12) between the paper machine floor (6) and the cellar floor (11).